Attached files

file filename
S-1/A - S-1/A - OncoMed Pharmaceuticals Incd344523ds1a.htm
EX-5.1 - EX-5.1 - OncoMed Pharmaceuticals Incd344523dex51.htm
EX-1.1 - EX-1.1 - OncoMed Pharmaceuticals Incd344523dex11.htm
EX-10.7 - EX-10.7 - OncoMed Pharmaceuticals Incd344523dex107.htm

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” and to the use of our report dated April 2, 2013 (except as to the last paragraph of Note 2, as to which the date is July X, 2013), in Amendment No. 9 to the Registration Statement (Form S-1 No. 333-181331) and related Prospectus of OncoMed Pharmaceuticals, Inc. for the registration of shares of its common stock.

Ernst & Young LLP

Redwood City, California

The foregoing consent is the form that will be signed upon the effectiveness of the reverse stock split as described in the last paragraph of Note 2 to the financial statements.

/s/ Ernst & Young LLP

Redwood City, California

July 8, 2013